Hi there, I just found out that the (json-rpc-)API treats URLs and base64-encoded files different. When I do this (in Python): for file in files: json = { 'jsonrpc': '2.0', 'id':0, 'method': 'append', 'params': [ file['name'], file['link'], '', 0, False, False, '', 0, 'SCORE', [ {'*unpack:':'yes'}, ...